The Brevard County Supervisor of Elections office makes it easy not only to vote by mail, but also to check the status of your ballot.
I voted by mail two days before Hurricane Milton arrived. I just checked online; my ballot has been received and counted!
If you live in Brevard County and want to vote by mail, you have until October 24 to request a ballot.
https://www.votebrevard.gov/Ballots-by-Mail/Check-My-Mail-Ballot-Status